... The path of the dome will now follow a different track in focus. ... The dome was set to 19.6 degrees. ... Focus curves taken with sbn (.ps) ( more info ) show the offset (in inches) from the the platform reference position (1256.22 feet). ... Moving the ref ch position from 8.84 to 18 degrees will raise the platform corner by .7 inches.7 platform inches is 1.7*.7 is 1.2 tie down inches of stroke .7 platform inches is 3.5 degrees F. The path length will increase by .1 in (za=2) to .8 inches (za=20)....

... The last quarter has seen Site Services continuing the installation of irrigation systems and new landscaping at the Visitor's Centre. ... The October 2000 term has been an interesting one in terms of operations at Parkes. ... The GPS systems at the Observatory are being upgraded to ensure the best possible long-term time reference is available for timing projects such as this. ... The influx of visitor interest was smoothly handled in the enlarged visitors centre, completed in August 2000. ...

INAF staff researcher at the Osservatorio Astrofisico di Arcetri in the Adaptive Optics Group. ... INAF - Osservatorio di Arcetri . ... pinna@arcetri.astro.it . ... Since 2004 I'm involved in the development of high order Adaptive Optics systems for ground based telescopes. ... Magellan Adaptive Optics system (collaboration with the Steward Observatory - USA) . ... The Giant Magellan Telescope adaptive optics program. ... MagAO: Status and on-sky performance of the Magellan adaptive optics system. ...

... The air just sit there and doesn't get stirred. ... Normally, the air is hottest near the ground and gets cooler as you go up. ... If it weren't for the temperature profile, convection wouldn't occur: Because the temperature decreases with altitude, cold air sits on top of hot air, allowing convection. ... The air above the ground is hot, the air above the water is cold. ... The land cools down faster than the sea, so the air above the ground is colder than the air above the water. ...

... Because of the Sun 's UV radiation, Earth 's upper atmosphere is partly (0.1% or less) ionized plasma at altitudes of 70-1500 km. ... Around the plasma density maximum (F-layer, see below) a so-called ionospheric waveguide is formed for magnetosonic waves . ... It is interesting to note that this works also the other way round and, for example, the auroral kilometric radiation created by the precipitating particles high above the ionosphere does not reach the ground because of the ionospheric E...

Ionized Gas in high-redshift galaxy halos . ... An alternative way to detect such galaxies is to analyze the spectra of luminous background objects (quasars and gamma-ray bursts), and look for the tell-tale absorption lines that arise due to foreground galaxies lying along the line-of-sight. ... Aside from their interest as the endpoints of massive star evolution, GRBs are ideal background sources for absorption-line spectroscopy, thanks to their enormous luminosities and smooth power-law continua. ...

... This huge ball of stars predates our Sun. ... The Galileo spacecraft now orbiting Jupiter took this picture of Jupiter's most active moon in June, although it was released just last week. ... Ice on the Moon? ... Red stars are cool, with temperatures of around 3,000 degrees Kelvin (K), while blue stars are hotter and can have temperatures over 30,000 degrees K. Our own lovely yellow Sun's temperature is a comforting 6,000 degrees K. Star Trails in Northern Skies . ... Aurora Astern . ...

... When it reaches 15 degrees C or around 60 degrees F. we are already feeling the cold and bundle up in blankets. ... When we walk on the beach which is about a half mile away from our school, we can hear the roar of the waves and feel the warm sea breeze. ... It is now about 72 degrees F. Carter - If I were at the beach, I would see the sun shining brightly on the beach of our glistening Kailua Bay. ... Kristina - Kailua Beach has beautiful bleached white sand which is hot from the sun. ...

... Bad Astronomy . ... Bad Astronomy : The seasons are caused by the change in the distance of the Earth to the Sun. ... The change in distance of the Earth to the Sun is a very minor player. ... Well, not completely wrong; certainly the Earth's distance from the Sun has something to do with the temperature, but it is a relatively minor effect. ... Basically, the temperature depends only weakly on distance changes; the temperature goes as the inverse square root of the distance of the planet to the Sun...

... Astrophysics Group . ... VSA . ... CAT . ... The Very Small Array is a custom-built radio telescope (operating between 26-36 GHz), designed expressly to make high resolution observations of the cosmic microwave background (CMB) radiation on angular scales around and below one degree. ... The VSA has been operated in ?compact array? and ?extended array? configurations (see the technical description below) and data collected to achieve high sensitivity in both regimes have been analysed. ... 1.75 GHz)...

All stars derive their energy through the thermonuclear fusion of light elements in to heavy elements. High temperatures are required so that the mutual electrostatic repulsion of the protons in each fusing atomic nucleus is overcome. ... Elements with more protons in their nuclei require higher temperatures. ... This sequence is now shown in the animation below. ... First Step of the Proton-Proton Chain Narration . Second Step of the Proton-Proton Chain Narration . ...

Triton ("TRY ton") is the seventh and by far the largest of Neptune 's satellites: orbit : 354,760 km from Neptune diameter : 2700 km mass : 2.14e22 kg . ... Triton has been visited by only one spacecraft, Voyager 2 on Aug 25 1989. ... Triton's orbit is retrograde . ... Triton is probably only about 25% water ice with remainder rocky material. Voyager found that Triton has an atmosphere, albeit a very tenuous one (about 0.01 millibar ), composed mostly of nitrogen with a small amount of methane. ...

M. D. Neusel Texas Tech University Lubbock, United States mara.d.neusel@ttu.edu Degree b ounds, the regular representation, and invariants of p ermutation groups in general Let F be a field, G a finite group, and consider a faithful representation of G : G GL(n, F) of degree n over F. Via the group G acts on the vector space V = Fn , hence on the dual space V , and thus on the symmetric algebra on the dual, denoted by F[V ]. ... Let : G GL(n, F) be an arbitrary nonmodular representation. ...

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. raguzova sai.msu.ru . (095) 939-50-06 . Last update on 16th February 2006

... This document and the attached postscript figure document an analysis that I did to determine the optimum midpoint and required ranges for both the rotator and azimuth for the 2.5 M telescope. ... I simulate a series of drift scans on the sky for tracks that cover the northern survey area. These tracks cover the range in survey latitude of -60 to +60 degrees, spaced by 10 degrees. ... Along each track the azimuth, elevation, and position angle of the CCD is computed at 1 minute intervals. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

Microsymposium 34, MS058, 2001 ANOMALIES OF THE MOON'S THERMAL EMISSION IN THE IR SPECTRAL RANGE (10.5 - 12.5 micron). ... Sternberg State Astronomical Institute, Moscow, 119899, Russia, pugach@sai.msu.ru Summary: New satellite measurements of the lunar-surface radiation temperature were used to construct the spatial angular function of thermal radiation of the Moon in the infrared (10.5-12.5 micron) spectral range. ... These thermal anomalies are observed only in the limited range of phase angles. ...

Wave propagation in an irregular plasma . Methods of the ionospheric plasma radio sounding . ... Program, Grant No. ... Investigation of Anomalous Attenuation Effect Caused by Radio Wave Scattering and Transformation on the Ionospheric Irregularities . ... Grant No. ... Diagnostics of Ionospheric Irregularity Spectrum Using Measurements of Radio Wave Anomalous Attenuation Under Vertical Sounding . ... Simple numerical model of radio wave multiple scattering effects in the ionospheric plasma layer. ...

... Scientists of Samara State Aerospace University (SSAU) have created an unique mobile platform for the production of training and gaming simulators. ... Such mobile platforms also known as the Stewart platforms became widespread in the world primarily as simulators for training of highly-qualified military pilots and drivers. ... For example, the Rocket and Space Centre Progress is going to test level sensors for residual fuel in the fuel tanks of the rocket carrier on this mobile platform. ...